CVE-2017-18486 - Insufficient Entropy in PRNG

Severity

65%

Complexity

80%

Confidentiality

106%

Jitbit Helpdesk before 9.0.3 allows remote attackers to escalate privileges because of mishandling of the User/AutoLogin userHash parameter. By inspecting the token value provided in a password reset link, a user can leverage a weak PRNG to recover the shared secret used by the server for remote authentication. The shared secret can be used to escalate privileges by forging new tokens for any user. These tokens can be used to automatically log in as the affected user.

Jitbit Helpdesk before 9.0.3 allows remote attackers to escalate privileges because of mishandling of the User/AutoLogin userHash parameter. By inspecting the token value provided in a password reset link, a user can leverage a weak PRNG to recover the shared secret used by the server for remote authentication. The shared secret can be used to escalate privileges by forging new tokens for any user. These tokens can be used to automatically log in as the affected user.

CVSS 3.0 Base Score 7.2. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 6.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:S/C:P/I:P/A:P).

Overview

First reported 5 years ago

2019-08-09 17:15:00

Last updated 5 years ago

2019-08-19 15:27:00

Affected Software

JitBit Helpdesk

References

https://github.com/Kc57/JitBit_Helpdesk_Auth_Bypass

Exploit, Third Party Advisory

https://packetstormsecurity.com/files/144334/JitBit-Helpdesk-9.0.2-Broken-Authentication.html

Third Party Advisory, VDB Entry

https://www.exploit-db.com/exploits/42776

Exploit, Third Party Advisory, VDB Entry

https://www.trustedsec.com/2017/09/full-disclosure-jitbit-helpdesk-authentication-bypass-0-day

Third Party Advisory

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